Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b6914739d20b8f…

MALICIOUS

PDF

96.7 KB Created: 2021-06-26 21:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 69bd3173bdb794885ea1923879ffc1f2 SHA-1: dd960b9b8c045200c5079af8927899493349c42d SHA-256: 64b6914739d20b8f91a59c59a8c02ffe6e24304b2ad98d8b90dc9f66befac926
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains numerous links, many of which point to compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The file's structure suggests it's designed to lure users into clicking these links, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/86e03240d850913ae69c1ca2bd89ac74/tivulijibexuga.pdf In PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fafb37969---61067524477.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/77e84c2f709b12c7209da2eff11a3fba/54710008079.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/6564278c6c177978a0e9ea611466f35f/64722534208.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/rie523g6054mp8d2j3dmh1lj5s/balitebekopatolakuvope.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/nasukalizotixanodafiz.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/bujagubatigesif.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5268906910---86693436195.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607026e0397fd---kolowededuzasasoseziwe.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/3qb9nc2b00a66d9381jf10hbeu/sipikojuf.pdfIn PDF document text
    • https://migger.dk/userimages/file/zasujagilo.pdfIn PDF document text
    • http://accronline.com/userfiles/file/72474811406.pdfIn PDF document text
    • http://www.moyekolodin.com/files/ruriwotirenikozonuni.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8ebb457b1---senelexofudexode.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906205099ef---60033961342.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a09304018f0---5852120266.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/vojowolitivewet.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc39c60b2a3---javizexokamefikujuzavor.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210612220412.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ecad50c1e---nebibekibidafuwugox.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c31ff0f84---43923603538.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/9c28525982fd61fd7f29527098fd5eb1/xolisexotevokugowazulof.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c98ac58f20---49402789867.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/d5b35ba87c28236edd7125cc6c2d7137/93182218757.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=interview+questions+and+answers+for+management+trainee+positionPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11489 17672 bytes
SHA-256: 515b1edc4005d200f0eb9b3ae6bbdad8991b644503781a0fb9016486582bbdba
font_01_sfnt_off00014325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14325 11144 bytes
SHA-256: 0bab09d0612c506e1f3d31de23a2fe8f7ed7a820dda2f4c43607e008c4a067ea
font_02_sfnt_off00015cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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